Many people have reported noticing a change in Siri's voice; it's not a huge difference, but it's noticeable enough to cause conversation.
This subtle shift in tone seems most apparent in the Australian, Irish, and American Siri voice options; some describe it as flatter or less engaging.
The recent iOS 18 update and its new Apple Intelligence features are the likely culprits behind this vocal adjustment; it’s part of a larger AI overhaul.
While Apple hasn't officially explained the change, users can switch back to the older Siri voice by disabling Apple Intelligence in their settings.
